Expansion-culvert.



PATENTED JULY 21, 1908. J ORGY. EXPANSION CULV'BRT.

APPLlOATION FILED FEB. 21, 1908.

EM us nioz aftopnn PATENT ()FFICE.

JOHN CROY, OF GREENVILLE, MICHIGAN.

EXPANSION-GULVERT.

I Specification of Letters Patent.

Patented July'21,"190 8.

- Application filed Februar-y21, 1908. Serial No. 417,066.

' T0-aZZ whom it may concern;

Belt known that I, JOHN OROY, a. citizen State of Michigan-have invented new anduseful Improvements. in ExpansiomCulverts, of which the followin is a specification,

object-of the invention being to provide an expansion culvert, or in other words a culvert madeu ofa' lurahtyof sect-1ons-hav-' ing a jointe inter ock ediand movable con- "ne'ction'with each other in order to adapt the culvert as aiwhole to readily. accommodate itself to'changes' temperature. v --W ith the above general object invi'ew, the

invention consists in the novel construction, combination.- and arrangement herein fullydescribed, illustrated and claimed.

bodyingthe present invention Fig. 2 is a side elevation of a' portion of the same. Fig.

3' is'a horizontal section taken on the line "33 of Fig. i lookingiizqnvard.

complete culvert 'or QOlili't which has a smooth interior to permitthe free and vun-.

interrupted'ilow'ofwater therethrough'.- v It will, of course, understoodat this point that each ofthe's'ections l, Zand 3'may it- ;The main or bott'om sec-tion 1 is by preference curved or slightly: dished transversely on its up er'side and is providedalong both sides Wit knuckles 4: substantially cylindrical in shape or in the form of. hollow sleeves, each of said knuckles being pro- I vided along its up er side with a continuous slot 5. which is pre erably flared, as shown, to admit of a limited-rocking movement ofthe sides of the culvert as hereinafter ticularly explained.

The side sectfonsZ and 3' are arched .as shown in Fig. 1 and constructed so as to overlap eachother at the top, one of the sections being rabbeted as shown at'6 toreceive the I end ofthe opposite-sidejsection to admit of This invention rel ates to' culverts the accompanying drawings "-Figurel is an end view of an expansion culvert'ernself be composed. of any'fdesirednumber ofsections according to the ng-th of the culvert.

sections and adapted to eXtend. -under the I adjacent extremity of the other side-section of the UnitedStates of America, residing at Greenville, in the county of Montcalm, and

thereby forming a thoroughly braced. con-' ,nec'tion between said sections at the .top of J the culvert. i I I Each of'the side sections 2 and 3 s provvided at its bottom edge Witha cylindrical ness of thebody of the side section while'the width of said slot isless than. the Width or diameter of the cylindrical bead- 8.. This permits the sections 2 or 3 to rock relatively to the bottom section while preventing any l h s n-' terlock rock joint is established between the sidesections of the culvert and the bottom possibility of the-two. sectionsbecomi-n'g disconnected one. from the other.

sections which permits a limited lateral rocking movement of the sidesections and take 'care'of thev ex ans'ionand contraction 'of each and allof't e sections both t'ransvers'ely' and longitudinally of'the culvert.

V Under the preferred" embodiment of 1 the. The culvert contemplated in this inven-.

invention, the sections of the culvert are proculvert as a page' By means scribed, .a-very desirable form of sectional culvert is provided, which does away with all rejections upon the interior of the culvert iiabie to catch and hold refuse, theinterior of the culvert being practically. smooth and un broken. 1 I r Having described.the-invention,I claim "as new:-''

A culvert comprising provided with knuckles havingslotsand side sections provided with cylindrical beads removably fitted in the knuckles, the slots of the knuckleshaving awidthin excess of the thickness of the side sections endless than the diameter of the cylindrical beads.

In testimony whereof I afiiX my signature in presence of two Witnesses.

' Jenn onor.

wholeagainst longitudinal slip er the construction that. de-- a bottom section 

